Electric Potential Zero Point

Two point charges are placed on the x axis. The charge + 5 q is at x =1.50m , and the charge −q
is at x= -1.50m .
There is a point on the x axis between the two charges where the electric potential is zero. Where is this point?

The electric potential also vanishes in one of the following regions: Region 1, 10.0m>x>1.50m ;
region 2, -1.50m >x> – 10.0m. Identify the appropriate region.
Find the value here.

2. Relevant equations

V= kq/r

3. The attempt at a solution

For part a)
0 = -1/x + 5/(3-x)
Solve for x, i got 0.5, which is from -1.50